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Article: Reports on electromagnetic research findings from University of Lille provide new insights.
- Article from:
- Electronics Newsweekly
- Article date:
- September 23, 2009
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According to recent research from France, "This paper deals with conducted electromagnetic interferences (EMIs) in adjustable-speed drive (ASD) systems. For some years, the use of high-speed switching power devices in ASDs induces high-voltage (dv/dt) and high-current (di/dt) variations that excite the parasitic elements of the power circuit, inducing conducted emissions."
"The advent of these devices has thus generated several unexpected problems, such as premature deterioration of motor ball bearings and high increases in the EMI levels, which are caused by the circulation of the high-frequency currents. In order to evaluate the level of the common-mode (CM) ...